油井变频电磁防蜡机理与实验分析

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1、～、●’MechanismandExperimentalStudyofOil-WellVariableFrequencyElectromagneticParaffinControlDaiYue(Oil&GasFieldDevelopmentEngineering)DirectedbyProf．ZhangJianguoAbstractVariablefrequencyelectromagneticparaffincontroltechnologyisanewphysicalmethod，whichhaStheadvantageoverot

2、hermethodsofparaffincontrolinlowcost，reservoirprotection，longperiodofvalidity,andconvenientmanagement．Itisalleconomicalandpracticalparaffincontroltechnology,whichalsohasanobviouseffectandbroadprospect·Accordingtothevariablefrequencyelectromagneticparaffincontroltechnolog

3、y,inordertoenhaIlcetheefleetandreducethecostofelectromagneticanti—waxing，laboratoryexperimentisstudied，optimumworkingparametersareobtained，andelectromagneticparaffincontrolmechanismisrevealedinthispaper．Paraffindepositmechanismisanalyzed．Influencingfactorsofparaffindepos

4、itionare吼lmmadzed．Paraffinremovingandinhibitingtechnologiesaresummedup．ParametersofthetwovariablefrequencyelectromagneticparaffincontrolexcitationsourcesaremeaSured·Thecun?entwaveformoftypeIissawtoothwave，thevoltagewaveformoftypeIissquarewave，aIldthevoltagewaveformoftype

5、IIismodulatedtriangularwave·ElectromagneticvibrationofthetwoexcitationSOUrCeSshowsfixedfrequency,namely100Hz．Optimum．!workingparametersareobtainedbymeansofwaxdissolvingexperiment，micro‘observationtecllIlology，aIldmethodsofcoolingcalveandviscosity-temperaturecurve．Theopti

6、malgearofpulsewidthoftypeIisgear3，theoptimalexcitingelectriccurrentoftypeIis2·5八andtheoptimalcyclenumberofknoboftypeIIis3．Theparaffininhibitingeffecttreatedbyeletromagneticfieldunderoptimumparametersisverifiedsignificantlybythemeanoftheelectromagneticparaffincontroldynam

7、icexperiment．TheWaxdissolvingtimeissubStantiallvreducedintheclosecondition，andthefreezingpointisdecreasedby3-5"C．The11‰．．瞎relationshipbetweenamplitudeofexcitedmechanicalvibrationandexcitingelectriccurrentisanalyzedintheexperimentofpipelinemechanicalvibrationexcitedbyelec

8、tromagneticfield．Mechanicalvibrationwaveexcitedbyelectromagneticfieldisrelativelyregularsinewave，andnoo